<!DOCTYPE html>
<title>SharedWorker: import failure</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script> setup({allow_uncaught_exception: true}); </script>
<script>

// TODO: Factor out the test cases into a separate file.
// (like import-test-cases.js)

// SharedWorkers doesn't fire error events when runtime script errors occur.
//
// "For shared workers, if the error is still not handled afterwards, the error
// may be reported to a developer console." [spec text]
// https://html.spec.whatwg.org/C/#runtime-script-errors-2

promise_test(async () => {
  const scriptURL = 'resources/import-scripts-worker.js';
  const worker = new SharedWorker(scriptURL, { type: 'module' });
  const msg_event =
    await new Promise(resolve => worker.port.onmessage = resolve);
  assert_equals(msg_event.data, 'TypeError');
}, 'importScripts() on module worker should throw an exception.');

promise_test(() => {
  const scriptURL = 'resources/non-existent-worker.js';
  const worker = new SharedWorker(scriptURL, { type: 'module' });
  return new Promise(resolve => worker.onerror = resolve);
}, 'Worker construction for non-existent script should dispatch an ' +
   'ErrorEvent.');

promise_test(() => {
  const scriptURL = 'resources/static-import-non-existent-script-worker.js';
  const worker = new SharedWorker(scriptURL, { type: 'module' });
  return new Promise(resolve => worker.onerror = resolve);
}, 'Static import for non-existent script should dispatch an ErrorEvent.');

promise_test(async () => {
  const scriptURL = './non-existent-worker.js';
  const worker =
      new SharedWorker('resources/dynamic-import-given-url-worker.js',
                       { type: 'module' });
  worker.port.postMessage(scriptURL);
  const msg_event = await new Promise((resolve, reject) => {
    worker.port.onmessage = resolve;
    worker.onerror = error => {
      const msg = error instanceof ErrorEvent ? error.message
                                              : 'unknown error';
      reject(msg);
    };
  });
  assert_equals(msg_event.data, 'TypeError');
}, 'Dynamic import for non-existent script should throw an exception.');

test(() => {
  const scriptURL = 'http://invalid:123$';
  assert_throws_dom('SyntaxError',
                    () => new SharedWorker(scriptURL, { type: 'module' }));
}, 'SharedWorker construction for an invalid URL should throw an exception.');

async_test((t) => {
  const scriptURL = 'file:///static-import-worker.js';
  const worker = new SharedWorker(scriptURL, { type: 'module' });
  worker.onerror = t.step_func_done(function(e) {
    assert_true(e instanceof Event);
  });

}, 'SharedWorker construction for a file URL should throw an exception.');

</script>
